Starting from thymol, a stereo-controlled synthesis of a cis-hydrindane derivative (12) possessing the desired stereochemistry at three asymmetric centres and functionalities for the synthesis of dendrobine (1) was carried out. In the final step of synthesizing 12, abnormal ozonolysis of an allylic acetate system in 10 was employed, which could be effected under specific conditions.
从
百里酚开始,进行了立体控制的顺式-氢化
茚衍
生物(12)的立体合成,该衍
生物在三个不对称中心具有所需的立体
化学,并且具有合成石d碱(1)的功能。在合成12的最后步骤中,采用了
乙酸烯丙酯体系在10中的异常
臭氧分解作用,这可以在特定条件下进行。